His brain, her brain.

This article reports on the suggested differences between the male and female brain. To date, no one has uncovered any evidence that anatomical disparities might render women incapable of achieving academic distinction in math, physics or engineering. Nevertheless, over the past decade investigators have documented an astonishing array of structural, chemical and functional variations in the brains of males and females. Furthermore, the differences imply that researchers exploring the structure and function of the brain must take into account the sex of their subjects when analyzing their data--and include both women and men in future studies or risk obtaining misleading results. INSETS: SIZABLE BRAIN VARIATION;WIRED PREFERENCES?;THE STRESSED HIPPOCAMPUS;THE AMYGDALA AND EMOTIONAL MEMORY